What is CVE-2026-69534?

CVE-2026-69534 is a high-severity vulnerability in Microsoft Windows 10 1607, classified under Command Injection. CVSS score: 7.8/10. Published 2026-09-08.

How severe is CVE-2026-69534?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Microsoft Windows 10 1607

CVE-2026-69534

Improper neutralization of special elements used in a command ('command injection') in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-09-08 · last modified 2026-09-24.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (24.1th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.003 · change: -0.005

Affected products

Weakness classification (CWE)

CWE-77 — Command Injection

References

Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-69534?: CVE-2026-69534 is a high-severity vulnerability in Microsoft Windows 10 1607, classified under Command Injection. CVSS score: 7.8/10. Published 2026-09-08.
How severe is CVE-2026-69534?: High severity. CVSS v3 base score is 7.8 out of 10.